Deep Dive into HTTP Caching: cache-control, no-cache, no-store, max-age, ETag and etc.

Caching on the Web Explained with simple examples of how HTTP Caching works, including Proxy Caching and CDNs, and how the Cache-Control header and other headers can be used with their best practices.

======⚡⚡⚡======
======⚡⚡⚡======

📚 Resources:

🕒 Timestamps:
(00:00) Why HTTP Caching is important?
(02:03) Cache hits and misses
(04:32) HTTP Caching overview
(05:42) What is a CDN?
(07:40) max-age
(09:17) no-store
(10:48) no-cache
(11:34) must-revalidate
(12:21) public, private
(13:11) immutable
(13:40) stale-while-revalidate
(14:26) stale-if-error
(15:51) Heuristic caching
(17:07) If-Modified-Since
(18:27) ETag/If-None-Match
(19:48) Cache busting

And don't forget to subscribe for more videos like this 😊

[SoftwareDeveloperDiaries]

Forgot to mention the "s-maxage" directive: it also indicates how long the response is going to be fresh, but it's only specific to public caches.

[spots]

The key nuance about must validate, is that an http response consists of both headers and body. With a validate request, the client still needs to make a request to the server, but the server can respond with headers only saying 'yup nothing changed ' and so the body does not need to be streamed.

[joachimzayana]

Please continue making video!
Explanation are clear, introduced at the right pace, looking forward watching the others

[shivanshagarwal]

went through a lot of content none could explain as easily as you did, thanks for the great video :)

[imtiazux]

Thank you so much. Everything are now clear like water. 👌

[nithathghm]

Thanks! Really nice way to explain concepts 🙂

[akashagarwal]

awesome video, really liked the in-depth details, no bullshit.

[slickchick]

This was so very helpful, thank you very much!

[quannguyenhong]

Thanks for the clear and concise video !

[fellainthewagon]

today i god this question on interview but no answered. Now I know a bit more about caching via http header, thanks!

[tech]

Great vid. Still confused between must-revalidate and stale-while-revalidate

[shaheenns]

The no-cache response directive indicates that the response can be stored in caches, but the response must be validated with the origin server before each reuse, even when the cache is disconnected from the origin server.

It goes to the server only for validaiton right ?

[gerogoya]

Great content!
I'm doing automation and have to check (by API) if an image has changed after selecting and saving a new one.
I store the image etag before updating the image and then I check if the etag is the same.
Is etag reliable for the purpose?
Thank you so much, I'm new suscriber.

[gabriel_bricage]

Hey, Great video!
I am learning how to create websites with html css and js. I don't know anything about php. To use no-store how can I write it in my code?
Thanks

[arknitosh]

Very Informative video. Thanks!

But can you please help me with the HTML code or .htaccess code? Also, How do I set the cache for 15 minutes?

[TuvRaz]

I am more confused new than I was before

[Sriram]

Would be nice if you add the nginx configs for the various items discussed in the video. :)

[abirsheikh]

How do my browser know which server of CDN to request?